<footer class="footer" *ngIf="itemCount > 0">
	<span class="todo-count">
		共 <strong>{{itemCount}}</strong> 个项目
	</span>
	<ul class="filters">
	  <li><a href="">全部</a></li>
	  <li><a href="">完成</a></li>
	  <li><a href="">删除</a></li>
	</ul>
	<button class="clear-completed">清除全部添加</button>
</footer>